CVE-2003-0415 in Remote Pc Access
Summary
by MITRE
Remote PC Access Server 2.2 allows remote attackers to cause a denial of service (crash) by receiving packets from the server and sending them back to the server.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 05/03/2019
The vulnerability identified as CVE-2003-0415 affects Remote PC Access Server version 2.2, representing a significant security flaw that enables remote attackers to execute denial of service attacks against targeted systems. This vulnerability operates through a specific packet handling mechanism that creates a recursive loop, ultimately leading to system instability and service disruption. The flaw exists within the server's network communication processing logic where improperly handled packets can trigger cascading failures that result in complete system crashes. The attack vector requires minimal privileges and can be executed remotely, making it particularly dangerous for systems that rely on this access server for remote connectivity and management operations.
The technical implementation of this vulnerability stems from inadequate input validation and packet processing within the Remote PC Access Server software. When the server receives packets from connected clients, it fails to properly validate the packet structure and content before forwarding them back to the originating server. This creates a condition where maliciously crafted packets can cause the server to enter an infinite loop or memory corruption state, leading to system instability and eventual crash. The flaw represents a classic example of improper handling of network traffic, which falls under the CWE-129 weakness category related to insufficient validation of length of input buffers. The vulnerability essentially creates a feedback loop where the server processes packets that it has already sent back to itself, causing resource exhaustion and system failure.
The operational impact of this vulnerability extends beyond simple service disruption, as it can compromise the availability of critical remote access services that organizations depend upon for system administration and maintenance. When exploited, the denial of service condition can render remote access servers completely inaccessible to legitimate users, forcing administrators to manually restart services or reboot entire systems. This disruption can have cascading effects on business operations, particularly in environments where remote access is essential for maintaining system uptime and performing routine maintenance tasks. The vulnerability affects systems that rely on the Remote PC Access Server for legitimate remote management activities, potentially creating security gaps as administrators may be forced to disable services or implement temporary workarounds. The attack can be particularly damaging in mission-critical environments where system availability is paramount.
Mitigation strategies for CVE-2003-0415 should focus on immediate patching of the Remote PC Access Server software to address the underlying packet processing flaw. Organizations should implement network segmentation and access controls to limit exposure of vulnerable servers to untrusted networks, reducing the attack surface available to potential adversaries. Network monitoring solutions should be deployed to detect anomalous packet patterns that may indicate exploitation attempts, providing early warning capabilities for administrators. Additionally, implementing rate limiting and packet filtering mechanisms can help prevent the recursive packet forwarding that leads to system crashes. From a defensive perspective, this vulnerability aligns with ATT&CK technique T1498 related to network denial of service, where adversaries target network services to disrupt availability. System administrators should also consider implementing redundant access methods and backup remote access solutions to maintain operational continuity during vulnerability remediation periods. The vulnerability demonstrates the importance of proper input validation in network services and highlights the need for comprehensive security testing of communication protocols.